package com.ruoyi.project.app.mapper;


import com.ruoyi.project.app.domain.Order;

/**
 * @author:刘仁有
 * @desc:
 * @email:953506233@qq.com
 * @data:2019/6/20
 */
public interface ProductMapper {

    //扣减库存
    boolean decrStock(int productId,int buyNum);

}
